McMaster 4599K48 Gradual On Off Valve, Bronze Body & Gate, Easy Maintenance, Wheel Handle Rising Stem, 2 NPT Female, Class 150, MSS SP 80 394 25250Z for extra torque and leverage for extra torque and leverage Overall Height 4 1 4 in Valve Function On Off Valve Type Gate Actuation Manual Handle Style Wheel Handle Material Iron Pipe Size 2 Gender Female Thread Type NPT Flow Coefficient (Cv) 230 Pressure Class 150 Maximum Pressure 300 psi @ 100° F Maximum Steam Pressure 150 psi @ 365° F Temperature Range 20° to 400° F Body Material Bronze Gate Material Bronze Packing Material Graphite End to End Length 3 5 8" Overall Height 13 1 4" Stem Type Rising Seal Type Packing For Use With Water they open and close gradually to prevent sudden starts and stops